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E. BGBHME. HYDRAULIC SHEARS.

Patented July 13, 1886.

Mlzes'es. mm1/c UNITED STATES PATENT OFFICE.

.EMIL BoEHME, or BEEsLAU, rEssIA, GERMANY.

HYD'RAULIG sHEARs..- -f

SPECIFICATION forming part of Letters Patent No. 345.358, dated J' uly 13. 1886.

` Application filed April s, 188.6.

To all whom it may concern:

Be it known that I, EMIL BoEIIME, a snb ject of the King of Prussia, residing at Breslau,in the Kingdom of Prussia, Germany` have invented new and useful Improvements inl Hydraulic Shears for Cutting Steel and Iron Plates, of which the following is a specification.

This invention has reference to shears lit to for cutting steel andl iron plates; and it consists in the elements of improvement hereinafter more fully pointed out.

In the accompanying drawings, Figure I is affront view of the machine. Fig. II is a side view, and Fig. III a planview, of t'ne same.

The machine consists of the bed-plate a, upon which are mounted the two cast-iron principal, pillars b b. These pillars are connectedtogether by strong stays c c c, and by 2o the table d, carrying on its inside the lower shear-blade, e. On the front side of the two pillars moves up and down in a guide the head f of the shears, which is composed of several plates of ductile iron connected by means ot' steel bolts. The head f, carrying the upper shear blade` g, is provided with two openings, h h, lined with hardened-steel Iplates. into which catch theeccentric taps s s of the two driving-shafts, 'i The two shafts 3o carry on the opposite ends the -two steel levers, k k', which are somewhat curved'inorder to give a free passage to long plates. By the turning of the shaftsz z' the eccentric taps s s, working in the openings h h, an. up-and- 5' down motion will be communicated' to this p head f. These two levers are connected on their lower ends by the rod l, while the drawing-rods m m are connected with the fore 1ever, k. The rods m m are in connection with o the hydraulic Vpump piston n by the cross- Y `heads o o', conducted in a straight direction yby the rods t t, and by the differential pis-v ytons' pp, working at the same timeLas, drawing-rods.

cylinder q andthe two secondary cylinders rr. When the'water, being under a suii.- ciently strong pressure, enters into the prinv cipal cylinder q, it acts againstthe piston n, 5o forcing the same outward, moving the crossheado', with pistons p p and ,cross-head o in' the same' direction", and as the latter crosshead is, by the rod m, connected with the le- The hydraulic cylinder consists of the main' seriaINo; 199,305. (No man.)

vers k It', motion will thereby be given to the same, and, consequently, a rotary motion to the shafts i i, so as to move the head f with the knife g downward. As soon as the strip is cut oiii` the water is lintroduced under they same pressure by a suitable valve into the two small cy-linders r r, when the pistons p p will be moved in the opposite direction, thereby reversing the motion of the v levers k k' and shafts@l i, so as to move the head f, wit-h its knife g, upward again. By Ineans of the valve the head 'of the shears can, of course, be stopped at any point by letting the water escape. It results that it is not necessary to move the blades of the shears in each as is'the case with the ordinary shears; but the attendant 'can regulate the motion of the by the size of the piece to be cut oii.

I claim as myinvention- A 1. The combination, in hydraulic shears, of head f, consisting ot' several plates of ductile iron connected together by means of steel bolts, and carrying upper shear-blade, g,witl1 table d, carrying lower y'shear blade, e, substantially as specified.

2. The combination of two driving-shafts, zi, provided with eccentric taps s s on one side, and with levers k kon the other side, with head f, carrying upper shear-blade, g, and with table d, carrying lower shear-blade, e, substantially as specified. r f

3.I vThe combination of hydraulic cylinders q r r, provided with pistons n p p, with the levers lc k', cross-heads o o', and drawing-rods m m, and with' head f, carrying upper shearblade, g, and tabled, carrying lower shearblade. e, substantially as specified.

4. lThe combination of hydraulic cylinders q rr, with the pistons n and p p, the pistons p p serving at the same time as guiding-rods for piston n, and to produce the back motionof levers k'k, that' operate the head f of the shears, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence -of two subscribing witnesses. l A

" f EMIL BOEHME.'

Witnesses:

1 PAUL-REMISE,

EDUARD KLEINERI.

case the whole way downward and upward,

blades, and move the exact distance required 

